Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29464cf075e8c21…

MALICIOUS

PDF

74.8 KB Created: 2021-08-06 05:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8449720c5fae6fa76b3bdce059ffa551 SHA-1: 211e4a28378b62f692939d4aa7f94ca2f2086048 SHA-256: b29464cf075e8c2186fd24d5d03c52bf3baed4e341cf46b0aac75dc4e34093c9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which point to compromised CMS upload directories on various websites. The heuristic firings indicate a link farm strategy, likely intended to host malicious content or redirect users to phishing sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, suggesting the document is designed to trick users into visiting these URLs, which may then lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9190

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753e2f08105---farutipisidixozako.pdf In PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/nodogivuravobuku.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16107ccd51ab94---27666559563.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/fapoj.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/kuwutova.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/9ifum7q8lvh032ceparuh0dlt1/62688791285.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/nenekumirut.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/84540152462.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/fj7cgvo4jrs7baklv9vj3g4bi6/zasotodazafezozuruwilotoz.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b068f344ca4---fadevuzirivor.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/0a3e0dca44b27dc3ab2c773aded3a0e4/jomavaxusefokoruxuvufula.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/funodorirepaj.pdfIn PDF document text
    • https://xn--faade-zra.ch/ckfinder/userfiles/files/zidobumane.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/4279873816.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/wamejamora.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45828374832.pdfIn PDF document text
    • http://strandedtattoo.com/file/sisogiwivaku.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/jimisetepuzobawibadubaki.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/22217910544.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=screen+mirroring+iphone+to+vizio+tv+not+workingPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE716 16920 bytes
SHA-256: 2c84e1f3eda6220876be7e9761b3d435c97235430bf55ba3afcb367e11c5c01b
font_01_sfnt_off000112e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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